Commercial Roof Repair in El Cajon, CA
1028 Broadway, El Cajon, CA 92021
Multi-Tenant Commercial Retail Building
Project Overview
About This Project
Interior ceiling stains indicated an active flat roof failure at this multi-tenant property. The modified bitumen system had undergone multiple patch repairs over time, but seasonal rainfall continued to expose weakened seams and deteriorated flashing along parapet walls. A comprehensive evaluation identified three primary leak sources: membrane separation, localized ponding areas, and compromised flashing transitions. The repair restored waterproof continuity, reinforced vulnerable membrane sections, corrected drainage issues, and extended the existing system's service life without full replacement.
Initial Assessment
Conditions Found
- Open seams along membrane overlaps allowing water entry
- Blistering from trapped moisture beneath the surface
- Flashing deterioration at parapet walls
- Drainage restrictions causing minor ponding near drains
- Previous repair patches losing adhesion
What We Used
Materials
- Modified bitumen membrane patches
- Industrial-grade bonding adhesive
- Reinforced flashing materials
- Waterproof seam sealant
- Corrosion-resistant fasteners
How It Was Done
Installation Process
Every project follows a structured, supervised process — from site assessment to final walkthrough.
Outcomes
Project Results
- All active leak sources sealed and waterproof continuity restored
- Stabilized flashing connections at parapet walls
- Improved drainage performance reducing ponding risk
- Extended roofing system service life without full replacement
- Tenant operations maintained with minimal disruption
Get Started
Request Your Free
Roof Inspection
A licensed inspector examines your roof and delivers a written report with photos. Most estimates back within 24 hours of the visit — no pressure, no obligation.
- Free inspection — no cost, no obligation
- Written estimate before any work begins
- In-house crews only — no subcontractors
- Licensed & insured (CSLB Lic# 1094851)
- Owens Corning Preferred Contractor
- Manufacturer + workmanship warranties